arch/arm/mach-davinci/board-omapl138-hawk.c

   1 /*
   2  * Hawkboard.org based on TI's OMAP-L138 Platform
   3  *
   4  * Initial code: Syed Mohammed Khasim
   5  *
   6  * Copyright (C) 2009 Texas Instruments Incorporated - http://www.ti.com
   7  *
   8  * This file is licensed under the terms of the GNU General Public License
   9  * version 2. This program is licensed "as is" without any warranty of
  10  * any kind, whether express or implied.
  11  */
  12 #include <linux/kernel.h>
  13 #include <linux/init.h>
  14 #include <linux/console.h>
  15 #include <linux/gpio.h>
  16
  17 #include <asm/mach-types.h>
  18 #include <asm/mach/arch.h>
  19
  20 #include <mach/cp_intc.h>
  21 #include <mach/da8xx.h>
  22 #include <mach/mux.h>
  23
  24 #define HAWKBOARD_PHY_ID                "davinci_mdio-0:07"
  25 #define DA850_HAWK_MMCSD_CD_PIN         GPIO_TO_PIN(3, 12)
  26 #define DA850_HAWK_MMCSD_WP_PIN         GPIO_TO_PIN(3, 13)
  27
  28 #define DA850_USB1_VBUS_PIN             GPIO_TO_PIN(2, 4)
  29 #define DA850_USB1_OC_PIN               GPIO_TO_PIN(6, 13)
  30
  31 static short omapl138_hawk_mii_pins[] __initdata = {
  32         DA850_MII_TXEN, DA850_MII_TXCLK, DA850_MII_COL, DA850_MII_TXD_3,
  33         DA850_MII_TXD_2, DA850_MII_TXD_1, DA850_MII_TXD_0, DA850_MII_RXER,
  34         DA850_MII_CRS, DA850_MII_RXCLK, DA850_MII_RXDV, DA850_MII_RXD_3,
  35         DA850_MII_RXD_2, DA850_MII_RXD_1, DA850_MII_RXD_0, DA850_MDIO_CLK,
  36         DA850_MDIO_D,
  37         -1
  38 };
  39
  40 static __init void omapl138_hawk_config_emac(void)
  41 {
  42         void __iomem *cfgchip3 = DA8XX_SYSCFG0_VIRT(DA8XX_CFGCHIP3_REG);
  43         int ret;
  44         u32 val;
  45         struct davinci_soc_info *soc_info = &davinci_soc_info;
  46
  47         val = __raw_readl(cfgchip3);
  48         val &= ~BIT(8);
  49         ret = davinci_cfg_reg_list(omapl138_hawk_mii_pins);
  50         if (ret) {
  51                 pr_warning("%s: cpgmac/mii mux setup failed: %d\n",
  52                         __func__, ret);
  53                 return;
  54         }
  55
  56         /* configure the CFGCHIP3 register for MII */
  57         __raw_writel(val, cfgchip3);
  58         pr_info("EMAC: MII PHY configured\n");
  59
  60         soc_info->emac_pdata->phy_id = HAWKBOARD_PHY_ID;
  61
  62         ret = da8xx_register_emac();
  63         if (ret)
  64                 pr_warning("%s: emac registration failed: %d\n",
  65                         __func__, ret);
  66 }
  67
  68 /*
  69  * The following EDMA channels/slots are not being used by drivers (for
  70  * example: Timer, GPIO, UART events etc) on da850/omap-l138 EVM/Hawkboard,
  71  * hence they are being reserved for codecs on the DSP side.
  72  */
  73 static const s16 da850_dma0_rsv_chans[][2] = {
  74         /* (offset, number) */
  75         { 8,  6},
  76         {24,  4},
  77         {30,  2},
  78         {-1, -1}
  79 };
  80
  81 static const s16 da850_dma0_rsv_slots[][2] = {
  82         /* (offset, number) */
  83         { 8,  6},
  84         {24,  4},
  85         {30, 50},
  86         {-1, -1}
  87 };
  88
  89 static const s16 da850_dma1_rsv_chans[][2] = {
  90         /* (offset, number) */
  91         { 0, 28},
  92         {30,  2},
  93         {-1, -1}
  94 };
  95
  96 static const s16 da850_dma1_rsv_slots[][2] = {
  97         /* (offset, number) */
  98         { 0, 28},
  99         {30, 90},
 100         {-1, -1}
 101 };
 102
 103 static struct edma_rsv_info da850_edma_cc0_rsv = {
 104         .rsv_chans      = da850_dma0_rsv_chans,
 105         .rsv_slots      = da850_dma0_rsv_slots,
 106 };
 107
 108 static struct edma_rsv_info da850_edma_cc1_rsv = {
 109         .rsv_chans      = da850_dma1_rsv_chans,
 110         .rsv_slots      = da850_dma1_rsv_slots,
 111 };
 112
 113 static struct edma_rsv_info *da850_edma_rsv[2] = {
 114         &da850_edma_cc0_rsv,
 115         &da850_edma_cc1_rsv,
 116 };
 117
 118 static const short hawk_mmcsd0_pins[] = {
 119         DA850_MMCSD0_DAT_0, DA850_MMCSD0_DAT_1, DA850_MMCSD0_DAT_2,
 120         DA850_MMCSD0_DAT_3, DA850_MMCSD0_CLK, DA850_MMCSD0_CMD,
 121         DA850_GPIO3_12, DA850_GPIO3_13,
 122         -1
 123 };
 124
 125 static int da850_hawk_mmc_get_ro(int index)
 126 {
 127         return gpio_get_value(DA850_HAWK_MMCSD_WP_PIN);
 128 }
 129
 130 static int da850_hawk_mmc_get_cd(int index)
 131 {
 132         return !gpio_get_value(DA850_HAWK_MMCSD_CD_PIN);
 133 }
 134
 135 static struct davinci_mmc_config da850_mmc_config = {
 136         .get_ro         = da850_hawk_mmc_get_ro,
 137         .get_cd         = da850_hawk_mmc_get_cd,
 138         .wires          = 4,
 139         .max_freq       = 50000000,
 140         .caps           = MMC_CAP_MMC_HIGHSPEED | MMC_CAP_SD_HIGHSPEED,
 141         .version        = MMC_CTLR_VERSION_2,
 142 };
 143
 144 static __init void omapl138_hawk_mmc_init(void)
 145 {
 146         int ret;
 147
 148         ret = davinci_cfg_reg_list(hawk_mmcsd0_pins);
 149         if (ret) {
 150                 pr_warning("%s: MMC/SD0 mux setup failed: %d\n",
 151                         __func__, ret);
 152                 return;
 153         }
 154
 155         ret = gpio_request_one(DA850_HAWK_MMCSD_CD_PIN,
 156                         GPIOF_DIR_IN, "MMC CD");
 157         if (ret < 0) {
 158                 pr_warning("%s: can not open GPIO %d\n",
 159                         __func__, DA850_HAWK_MMCSD_CD_PIN);
 160                 return;
 161         }
 162
 163         ret = gpio_request_one(DA850_HAWK_MMCSD_WP_PIN,
 164                         GPIOF_DIR_IN, "MMC WP");
 165         if (ret < 0) {
 166                 pr_warning("%s: can not open GPIO %d\n",
 167                         __func__, DA850_HAWK_MMCSD_WP_PIN);
 168                 goto mmc_setup_wp_fail;
 169         }
 170
 171         ret = da8xx_register_mmcsd0(&da850_mmc_config);
 172         if (ret) {
 173                 pr_warning("%s: MMC/SD0 registration failed: %d\n",
 174                         __func__, ret);
 175                 goto mmc_setup_mmcsd_fail;
 176         }
 177
 178         return;
 179
 180 mmc_setup_mmcsd_fail:
 181         gpio_free(DA850_HAWK_MMCSD_WP_PIN);
 182 mmc_setup_wp_fail:
 183         gpio_free(DA850_HAWK_MMCSD_CD_PIN);
 184 }
 185
 186 static irqreturn_t omapl138_hawk_usb_ocic_irq(int irq, void *dev_id);
 187 static da8xx_ocic_handler_t hawk_usb_ocic_handler;
 188
 189 static const short da850_hawk_usb11_pins[] = {
 190         DA850_GPIO2_4, DA850_GPIO6_13,
 191         -1
 192 };
 193
 194 static int hawk_usb_set_power(unsigned port, int on)
 195 {
 196         gpio_set_value(DA850_USB1_VBUS_PIN, on);
 197         return 0;
 198 }
 199
 200 static int hawk_usb_get_power(unsigned port)
 201 {
 202         return gpio_get_value(DA850_USB1_VBUS_PIN);
 203 }
 204
 205 static int hawk_usb_get_oci(unsigned port)
 206 {
 207         return !gpio_get_value(DA850_USB1_OC_PIN);
 208 }
 209
 210 static int hawk_usb_ocic_notify(da8xx_ocic_handler_t handler)
 211 {
 212         int irq         = gpio_to_irq(DA850_USB1_OC_PIN);
 213         int error       = 0;
 214
 215         if (handler != NULL) {
 216                 hawk_usb_ocic_handler = handler;
 217
 218                 error = request_irq(irq, omapl138_hawk_usb_ocic_irq,
 219                                         IRQF_DISABLED | IRQF_TRIGGER_RISING |
 220                                         IRQF_TRIGGER_FALLING,
 221                                         "OHCI over-current indicator", NULL);
 222                 if (error)
 223                         pr_err("%s: could not request IRQ to watch "
 224                                 "over-current indicator changes\n", __func__);
 225         } else {
 226                 free_irq(irq, NULL);
 227         }
 228         return error;
 229 }
 230
 231 static struct da8xx_ohci_root_hub omapl138_hawk_usb11_pdata = {
 232         .set_power      = hawk_usb_set_power,
 233         .get_power      = hawk_usb_get_power,
 234         .get_oci        = hawk_usb_get_oci,
 235         .ocic_notify    = hawk_usb_ocic_notify,
 236         /* TPS2087 switch @ 5V */
 237         .potpgt         = (3 + 1) / 2,  /* 3 ms max */
 238 };
 239
 240 static irqreturn_t omapl138_hawk_usb_ocic_irq(int irq, void *dev_id)
 241 {
 242         hawk_usb_ocic_handler(&omapl138_hawk_usb11_pdata, 1);
 243         return IRQ_HANDLED;
 244 }
 245
 246 static __init void omapl138_hawk_usb_init(void)
 247 {
 248         int ret;
 249         u32 cfgchip2;
 250
 251         ret = davinci_cfg_reg_list(da850_hawk_usb11_pins);
 252         if (ret) {
 253                 pr_warning("%s: USB 1.1 PinMux setup failed: %d\n",
 254                         __func__, ret);
 255                 return;
 256         }
 257
 258         /* Setup the Ref. clock frequency for the HAWK at 24 MHz. */
 259
 260         cfgchip2 = __raw_readl(DA8XX_SYSCFG0_VIRT(DA8XX_CFGCHIP2_REG));
 261         cfgchip2 &= ~CFGCHIP2_REFFREQ;
 262         cfgchip2 |=  CFGCHIP2_REFFREQ_24MHZ;
 263         __raw_writel(cfgchip2, DA8XX_SYSCFG0_VIRT(DA8XX_CFGCHIP2_REG));
 264
 265         ret = gpio_request_one(DA850_USB1_VBUS_PIN,
 266                         GPIOF_DIR_OUT, "USB1 VBUS");
 267         if (ret < 0) {
 268                 pr_err("%s: failed to request GPIO for USB 1.1 port "
 269                         "power control: %d\n", __func__, ret);
 270                 return;
 271         }
 272
 273         ret = gpio_request_one(DA850_USB1_OC_PIN,
 274                         GPIOF_DIR_IN, "USB1 OC");
 275         if (ret < 0) {
 276                 pr_err("%s: failed to request GPIO for USB 1.1 port "
 277                         "over-current indicator: %d\n", __func__, ret);
 278                 goto usb11_setup_oc_fail;
 279         }
 280
 281         ret = da8xx_register_usb11(&omapl138_hawk_usb11_pdata);
 282         if (ret) {
 283                 pr_warning("%s: USB 1.1 registration failed: %d\n",
 284                         __func__, ret);
 285                 goto usb11_setup_fail;
 286         }
 287
 288         return;
 289
 290 usb11_setup_fail:
 291         gpio_free(DA850_USB1_OC_PIN);
 292 usb11_setup_oc_fail:
 293         gpio_free(DA850_USB1_VBUS_PIN);
 294 }
 295
 296 static struct davinci_uart_config omapl138_hawk_uart_config __initdata = {
 297         .enabled_uarts = 0x7,
 298 };
 299
 300 static __init void omapl138_hawk_init(void)
 301 {
 302         int ret;
 303
 304         davinci_serial_init(&omapl138_hawk_uart_config);
 305
 306         omapl138_hawk_config_emac();
 307
 308         ret = da850_register_edma(da850_edma_rsv);
 309         if (ret)
 310                 pr_warning("%s: EDMA registration failed: %d\n",
 311                         __func__, ret);
 312
 313         omapl138_hawk_mmc_init();
 314
 315         omapl138_hawk_usb_init();
 316
 317         ret = da8xx_register_watchdog();
 318         if (ret)
 319                 pr_warning("omapl138_hawk_init: "
 320                         "watchdog registration failed: %d\n",
 321                         ret);
 322 }
 323
 324 #ifdef CONFIG_SERIAL_8250_CONSOLE
 325 static int __init omapl138_hawk_console_init(void)
 326 {
 327         if (!machine_is_omapl138_hawkboard())
 328                 return 0;
 329
 330         return add_preferred_console("ttyS", 2, "115200");
 331 }
 332 console_initcall(omapl138_hawk_console_init);
 333 #endif
 334
 335 static void __init omapl138_hawk_map_io(void)
 336 {
 337         da850_init();
 338 }
 339
 340 MACHINE_START(OMAPL138_HAWKBOARD, "AM18x/OMAP-L138 Hawkboard")
 341         .atag_offset    = 0x100,
 342         .map_io         = omapl138_hawk_map_io,
 343         .init_irq       = cp_intc_init,
 344         .timer          = &davinci_timer,
 345         .init_machine   = omapl138_hawk_init,
 346         .dma_zone_size  = SZ_128M,
 347         .restart        = da8xx_restart,
 348 MACHINE_END